Australian Diplopteroua Ily menoptera. 390 



tuherctilate at thu base. Tlic apical steriiites from tlic third 

 are dull ferru^^Muous brown. 



H<tb. Townsville, Queensland (Dorffl). 



Extremely like aterrimus^ but dilFers in the broader and 

 eraarginate clypeus, in the yellow base of the clypeus, in 

 the colour of the ajjieal sternites, aud in the more strongly 

 raised aud tulxM'cnInte base of the secoud sternite. Both 

 species are very ditfercnt in colour Fitjni other species of 

 the genus, superficially resembling Vdynerus dietrichianus^ 

 Sauss., ami other similarly coloured Odynerus. In botli 

 species the clypeus is feebly convex, somewhat more strongly 

 in aterrinius than in diabolicus. The two species ap()ear to 

 be closely allied, much more so than is usually the ease in 

 species with the same colour-pattern found in tlie same 

 locality. 



Paralastor submersus, sp. n. 



$ . Nipra ; macula parva interanteiinali, tergitoquesecnnda macula 

 niaxiraa utrinque in medio couHuentibus, flavis ; alis iufuacatis, 

 venis nigris. 

 Long. 11 mm. 



? . Clypeus strongly and rather sparsely punctured, flat, 

 widely and rather shallowly emarginate at the apex, the 

 apical margin distinctly raised. Head coarsely and closely 

 punctured, thorax punctured-rugose, tegulse sparsely punc- 

 tured at the base, more closely towards the apex. Median 

 segment punctured-rugose ; first tergite strongly punctured, 

 the punctures becoming sjjarse and smaller towards the 

 apex ; second tergite much more finely and sparsely punc- 

 tured, the punctures becoming much closer and rather larger 

 at the apex. Second sternite strongly punctured, raised and 

 subtuberculate at the base. 



Hub. Lolwortli Station, N. Queensland; June 29, 1901. 

 lleceived from Mr. Froggatt. 1 ? . 



Superficially this somewhat resembles P. conspiciendus, 

 Perkins, but the form of the clypeus shows that it is really 

 allied to the group of P. mackayeusis, Perkins, and P. cari- 

 nutus, Sm. The vessel on which the box containing the 

 s))ecimen was sent was torpedoed, and the box was sub- 

 n)erged, ])ut after tieatment the specin)en was dried in a 

 fairly satisfactory manner. 



in all species descril)ctl here the length measurement is to 

 the apex of tiie second abdomiual segment. The tyjx's are 

 in the British Museum. 



